Slimduct Line Set Covers

Slimduct line set covers protect refrigerant tubing, electrical wiring, and condensate drain lines that run between an outdoor condenser and an indoor ductless or mini split unit. The system ships in three duct sizes, 2.75 inch, 3.75 inch, and 5.5 inch, giving installers a diameter match for anywhere from a single line set to a larger bundled run. Four color options, white, ivory, brown, and black, let a cover blend against siding, brick, or trim instead of leaving bare copper exposed on an exterior wall. Straight sections, elbows, tees, and wall or soffit inlets snap together without adhesive on most joints, which keeps install time down on both new mini split hookups and retrofits where a homeowner wants exposed lines hidden after the fact. A cover system that matches a building's finish and holds up to sun and weather cuts down on callbacks tied to cracked or faded tubing months after a job wraps.

Subcategories

• Straight Duct Sections: Straight sections form the backbone of a line set cover run and come in the same 2.75 inch, 3.75 inch, and 5.5 inch diameters as the rest of the system. Installers choose section size based on how many lines and how much wiring need to fit inside a single duct run. A tech running a single line set to a wall mounted mini split typically reaches for the smallest diameter, while a multi zone system with several line sets bundled together calls for the largest.
• Elbow and Tee Fittings: Elbows and tees route line set covers around corners, up exterior walls, and into branch points where one run splits into two. Both snap onto straight duct sections without solvent or separate fasteners, matching the tool-free assembly of the rest of the system. Contractors use flat elbows for tight turns along a wall and vertical elbows where the run needs to climb from grade to a soffit penetration.
• Wall and Soffit Inlets: Wall and soffit inlets seal the point where line sets pass through an exterior wall or soffit on their way to an indoor unit. Techs fit these pieces first during rough-in, before the rest of the cover run gets snapped into place, so the transition from outdoor duct to indoor line set stays weathertight. Matching inlet size to the duct diameter chosen for the rest of the run keeps the whole system sealed against wind-driven rain.
• Installation Tools and Accessories: Cutting tools, strap kits, and mounting hardware round out the Slimduct lineup so a crew can trim duct to length and anchor a cover to siding, brick, or block on site. A dedicated cutting tool squares up a cut across the duct profile faster than a hand saw, which matters on days with several covers to install back to back. Strap kits secure longer straight runs to the wall at set intervals so the cover does not sag or pull loose over time.

Buying Guide

Selecting the right line set cover starts with counting what needs to run inside it. A single line set with a control wire fits comfortably in the smallest 2.75 inch duct, while two line sets or a line set paired with a condensate drain usually needs the mid or large diameter. Contractors installing Slimduct Line Set Covers on a multi zone system should size the duct to the busiest run on the job, then use a smaller diameter for branch lines feeding individual indoor heads.

Color choice comes next, and it matters more for a callback-free job than it might seem. Matching cover color to existing siding or trim keeps the finished look clean, and homeowners notice a mismatched brown cover on a white house fast. White and ivory work well against light siding, while brown and black blend into darker trim, brick, or shaded exterior walls.

Fitting selection rounds out the plan. Straight duct handles most of the run, but every corner, wall penetration, and branch point needs a matching elbow, tee, or inlet. Ordering fittings alongside straight duct in the same diameter and color avoids a second trip to source a missing piece. Crews that standardize on one duct size and color across a service area also cut down on inventory headaches, since one set of fittings covers most jobs.

Frequently Asked Questions

What size Slimduct line set cover fits a typical single-zone mini split?

A single line set with its control wire usually fits inside the smallest 2.75 inch duct. Larger duct sizes make sense once a condensate drain line or a second line set needs to share the same run.

Can Slimduct fittings be painted to match a house color that is not one of the four stock options?

The cover surface accepts paint, so a color outside the four stock options is achievable with a compatible exterior paint. Priming the duct first helps paint adhere and hold up under UV exposure over time.

Do Slimduct components require solvent cement or adhesive to assemble?

Most straight sections, elbows, and tees snap together without solvent or adhesive. Some installers still add a bead of sealant at wall and soffit inlet penetrations to guard against wind-driven rain.

What tool cuts Slimduct straight sections to length on site?

A dedicated duct cutting tool squares up the cut faster and cleaner than a hand saw or utility knife. Keeping one on the truck saves time on any job with more than one cover run.

How is a line set cover routed through an exterior wall?

A wall inlet fitting seals the wall penetration and connects to the straight duct on both the outdoor and indoor sides of the run. Installing the inlet during rough-in, before the rest of the cover snaps into place, keeps the transition weathertight.